package com.zut.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zut.exception.CustomException;
import com.zut.mapper.CategoryMapper;
import com.zut.pojo.Category;
import com.zut.pojo.Dish;
import com.zut.pojo.Setmeal;
import com.zut.service.CategoryService;
import com.zut.service.DishService;
import com.zut.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;


@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;


    /*
      * 根据id删除分类，删除之前需要进行判断
      *
      * */

    @Override
    public void remove(Long ids) {

        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,ids);
        int count1 = dishService.count(dishLambdaQueryWrapper);
        if (count1 > 0){
            //抛出异常
            throw new CustomException("当前分类下关联了菜品，删除失败");
        }


        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,ids);
        int count2 = setmealService.count(setmealLambdaQueryWrapper);
        if (count2 > 0){
            //抛出异常
            throw new CustomException("当前分类下关联了套餐，删除失败");
        }

        super.removeById(ids);

    }
}
